week 9- Elbow Flashcards
Name the joints located at the elbow
Radioulnar
Humeroulnar
Humeroradial
Name the tuberosity on the elbow
Olecranon
When is bony stability unlocked in the elbow
Once it flexes beyond 20 degrees of movement
What does the elbow unlocking allow
More Varuz and valgus laxity
What is stability in flexion provided by
Radial and ulnar collateral ligaments
Type of joint of radio-ulnar
Pivot
Describe movement of radioulnar joint
Radial head rotates around proximal ulna
Where does medial (ulna) collateral ligament attach
From medial epicondyLe of numerous to the coronoid and olecranon process of the ulna
What bone is olecranon located on
Ulna
Function of medial collateral ligament
Stability to the elbow during flexion
Resists varus stress to the elbow
Function of lateral collateral ligament
Stability to the elbow during flexion
Resists varus stress to the elbow
Location of lateral collateral ligament
From lateral epicondyle
To head of radius and annular ligament
Function of annular ligament
Provides a sling effect around radial head for stability
Flexors of the elbow
Biceps brachii
Brachialis
Brachioradialis
Extensors of the elbow
Triceps brachii
Anceneus
Supinators of the elbow
Supinator
Biceps brachii
Pronators of the elbow
Pronator teres
Pronator quadratus
Which muscle allows shoulder abduction
Deltoid
Which muscle allows wrist extension
Extensor
Which muscle allows finger abduction
Dorsal interossei
Which muscle allows finger adduction
Palmar interossei
Which muscle allows thumb abduction
Adductor pollucus brevis
Which muscle allows thumb adduction
Addductor pollucis
Location of capitellum
Inferiorly on humerous, most laterally
Location of trochlea
Inferiorly on humerous, most medially
Location of coronoid fossa
Superiorly to the trochlea, the indent
Location of radial fossa
Superior to thr capitellum
Location of coronoid process
Superior on ulna. Upward curve in middle
Location of radial notch of the ulna
Superior on ulna, where ulna middle curve meets the radius
Location of humeral shaft
Ridge on humerous (middle)
Location of ulnar shaft
Ridge on ulna in the middle
Location of radial shaft
Ridge on radius in the middle
biceps brachii origin
Long head originates from the supraglenoid tubercle of the scapula, and the short head originates from the coracoid process of the scapula
biceps brachii insertion
Both heads insert distally into the radial tuberosity
and the fascia of the forearm via the bicipital aponeurosis.
biceps brachii funcions
Supination of the forearm,
flexion at the elbow and shoulder.
biceps brachii blood supply
brachial artery
supraglenoid tubercle of scapula located
on the distal end of the scapula.
what is the synovium
ct that lines the inside of a joint capsule
where is the ulnar tuberosity
located immediatly inferior to the coronoid process
where is the radial tuberosity
on the medial surface of proximal part of the radius, just distal to the neck.
where is the lesser sigmoid notch of the ulna
lateral to the coronoid process, an inward arch
where is the greater sigmoid notch of the ulna
superior inward arch to the coronoid process
where is the radial/bicepital tuberosity located
inferior to the neck of the radius
what does the humerol trochlea articulate with
ulnar trochlear notch
flexors of the elbow
Biceps Brachii
Brachialis
Brachioradialis
supinators of the elbow
Supinator
Biceps Brachii
extensors of the elbow
Triceps brachii
Anconeus
pronators of the elbow
Pronator teres
Pronator quadratus
brachialis origin
medial and lateral surfaces of the humerus shaft.
brachialis insertion
ulnar tuberosity, immediately distal to the elbow joint
brachialis function
flexion at elbow
brachialis blood supply
Brachial artery and radial artery
innervation also by radial artery
brachioradialis origin
proximal aspect of the lateral supracondylar ridge of humerus
brachioradialis insertion
distal end of the radius, just proximal to the radial styloid process.
brachioradialis action
Flexion at the elbow
brachioradialis innervation and blood supply
Innervation: Radial nerve.
Blood supply: Radial artery.
triceps brachii origin
Long head originates from the infraglenoid tubercle of the scapula.
Lateral head originates from the humerus (superior to the radial groove).
Medial head originates from the humerus (inferior to the radial groove).
triceps brachii insertion
the heads converge into one tendon which inserts onto the olecranon of the ulna.
triceps brachii action
Extension of the arm at the elbow.
triceps brachii blood supply and innervation
Blood Supply: Deep bracial (profunda brachii) artery
Innervation: Radial nerve
supinator origin
Originates from the lateral epicondyle of the humerus and the posterior surface of the ulna.
supinator inserion
posterior surface of the radius
supinator action
supination of formearm
supinator
Innervation: Radial nerve (deep branch).
Blood supply: Ulnar artery.
pronator teres origin
medial epicondyle of the humerus and the coronoid process of the ulna
pronator teres insertion
laterally to the mid-shaft of the radius.
pronator teres
Pronation of the forearm.
pronator teres
Innervation: Median nerve.
Blood supply: Ulnar artery
pronator quadratus origin
anterior surface of the ulna
pronator quadratus insertion
anterior surface of the radius.
pronator quadratus action
Pronates the forearm
pronator quadratus innervation and blood supply
Innervation: Median nerve (anterior interosseous branch).
Blood supply: Ulnar artery
where do wrist flexors originate
medial epicondyle
where do wrist extensors originate
lateral epicondyle
Name locations on radius
Head
Neck
Radial/bicepital tuberosity (opposite side)
Name locations of the proximal ulna
Olecranon process
Greater sigmoid notch
Lesser sigmoid notch
Coronoid process
Styloid process at inferior end
Name locations on humerous
Head
Anatomical Neck (lateral)
Greater tubercle
Lesser tubercle
Surgical neck
Bicepital groove
Lateral supraconfylar ridge
Medial supracondylar ridge
Lateral epicondyle
Medial epicondyle
Trochlea
